I am looking for a definitive answer on the size of the bolts that fasten the lower edge of the front fender to the rocker panel front. Some people indicate that the bolt should be a 12mm head but also an m8-?? thread (either 1.0 or 1.25). I can find m8-1.25 stainless or zinc-plated bolts but they have 13mm heads. I can't find any bolt with a 12mm head. The ones on my car have been hacked by replacement with a self-tapping bolt so matching that is not on. It's a small detail, but I would like to get it right if possible. The original part number is 08360-81610 but I can't find a spec for that to indicate the size.

Thanks,

Alan

Alan - the metric fasteners in the Z are JIS - Japanese Industrial Standard. The metric that is 8mm with a 13mm head is ANS/ISO or DIN.

Here in Clearwater, FL - our local ACE Hardware Store carries some JIS hex head bolts - maybe someone near you does too.

FWIW,

Carl B.

Carl;

Thanks for the quick response. That makes sense. Do you know if the thread is m8-1.0 or m8-1.25?

Alan

No - I don't have a written spec for them.

Not too many bolts in the 240Z 8m-1.0's as I recall. Most are 1.25 or 1.5

FWIW,

Carl B.

Can't think of any 8mm bolts that are not 1.25 thread an a Z. Those fender bolts are 1.25 for sure.

Just a quick note, up til 1986 (while was parts manger at a Honda shop) all the oem bolts for Honda, Yamaha, Kawasaki, Suzuki were JIS bolts. Very easy for them to find the bolt(s) you need.